RACK may be seen as focusing primarily upon awareness and informed consent, rather than accepted safe practices. Often, slave contracts are set out in writing to record the formal consent of the parties to the power exchange, stating their common vision of the relationship dynamic. Given the wide range of practices, some of which may be engaged in by people who do not consider hentai videos themselves as practicing BDSM, inclusion in gay twink porn the BDSM community or subculture is usually dependent on self-identification and shared experience. Although macrophilia literally translates to simply a lover of large, in the context of a sexual fantasy it is used to mean someone who attracted to beings larger than themselves. POV pornography involves camera angles designed to provide the viewer a view similar to that seen by one of the participants, whose face is never shown. Cum-shot pornography features a collection of male ejaculation scenes. Gang bang pornography is a type of pornography that nude milfs depicts an individual engaging in physical sexual activity with multiple partners sequentially or at once. Ethnic pornography is a genre of pornography that features performers of specific ethnic groups, or depictions of interracial sexual activity. Social attitudes towards the discussion and presentation of sexuality has become more tolerant and legal definitions of obscenity have become more limited, leading to an industry for the production and consumption of pornography in the latter half of the 20th century. A variant of this is known as ATOM or ATOGM where the insertive partner removes his penis from one recipient anus and inserts it into a second recipient mouth. Pornography can be classified according to the physical characteristics of the participants, fetish, sexual orientation, etc., as well as the types of sexual activity featured. Fisting may be performed with or without a partner. This is commonly called double anal or double stuffing. Accepting that Eros is not always pretty, and may involve the forbidden or taboo - as with women pornography – forms part of the struggle with the good girl/bad girl or virgin-whore split in postmodern femininity.